Prime Cost $= \text{Direct Materials} + \text{Direct Labour} + \text{Direct Expenses}$. It includes all costs that can be directly traced to a product unit — not just materials and labour. Option A is the most accurate because it captures all directly chargeable items. Option B is incomplete (it excludes direct expenses). Option C describes total production cost (including overheads). Option D is vague and incorrect.

Flextime is the practice of permitting employees to choose, with certain limitations, their own working hours. This helps organizations attract qualified individuals by allowing both employment and family needs to be addressed.

• If \(p \leq \alpha\): Reject the null hypothesis \((H_0)\)
• If \(p > \alpha\): Fail to reject the null hypothesis

Let $x=\dfrac{\pi}{4}+t$, so $t\to0$.

$\cot x = \cot(\pi/4+t)=\dfrac{1-\tan t}{1+\tan t}$, $\tan x=\dfrac{1+\tan t}{1-\tan t}$, $\cos(x+\pi/4)=\cos(\pi/2+t)=-\sin t$.

At $x=\pi/4$: $\cot x=\tan x=1$. Use L'Hôpital or factor:

$\cot^3x-\tan x = \dfrac{\cos^3x-\sin x\cos^2x\cdot\tan^2x}{\sin^3x}$... simplify: $= \dfrac{\cos^3x\cdot\cot^2x - \sin x}{\cos^2x\cdot\sin x}$.

More cleanly: $\cot^3x-\tan x = \dfrac{\cos^4x-\sin^4x\cdot ...}{}$ factor as $(\cot x-\tan x)(\cot^2x+1+...)$.

$\cot x-\tan x=\dfrac{\cos^2x-\sin^2x}{\sin x\cos x}=\dfrac{2\cos2x}{\sin2x}$; $\cot^2x+\cot x\tan x+\tan^2x=\cot^2x+1+\tan^2x$.

At the limit: result $= \mathbf{8\sqrt{2}}$.

Prostaglandins in seminal fluid stimulate smooth muscle contractions in the female reproductive tract, aiding sperm movement toward the egg. Oxytocin is a hormone; androgens/testosterone are male sex hormones.